We migrated our applications from Jdev 11.1.1.5 to 11.1.2. We encounter several issues. For some of them we found work around. Not for this one though.
Consider a jsff page with a table. A commandLink inside a column has to call a popup.
We get the error whenever we call a taskflow in an inline popup that contains a jsf page.The error does NOT occur if the popup is part of the page (showPopupBehavior).

The error shows only in console and even it does not cause crash, it sounds dangerous.

here is the error in the console:
<RowKeySetAttributeChange$GetOldValueAndUpdate> <_updateKeySet> Failed to apply row key set attribute change. Reason : {1}
java.lang.NullPointerException
at oracle.jbo.uicli.binding.JUCtrlHierNodeBinding.<init>(JUCtrlHierNodeBinding.java:212)
at oracle.adfinternal.view.faces.model.binding.FacesCtrlHierNodeBinding.<init>(FacesCtrlHierNodeBinding.java:71)
at oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding.createNodeBinding(FacesCtrlHierBinding.java:104)
at oracle.jbo.uicli.binding.JUCtrlHierBinding.createRootBinding(JUCtrlHierBinding.java:410)
at oracle.jbo.uicli.binding.JUCtrlHierBinding.getRootNodeBinding(JUCtrlHierBinding.java:97)
at oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding$HierCurrencyRowKeySet.getRowIterator(FacesCtrlHierBinding.java:1421)
at oracle.adfinternal.view.faces.model.binding.CurrencyRowKeySet._computeCurrentRowKey(CurrencyRowKeySet.java:125)
at oracle.adfinternal.view.faces.model.binding.CurrencyRowKeySet.iterator(CurrencyRowKeySet.java:41)
at java.util.AbstractCollection.addAll(AbstractCollection.java:303)
at org.apache.myfaces.trinidad.change.RowKeySetAttributeChange$GetOldValueAndUpdate._updateKeySet(RowKeySetAttributeChange.java:136)
at org.apache.myfaces.trinidad.change.RowKeySetAttributeChange$GetOldValueAndUpdate.invokeContextCallback(RowKeySetAttributeChange.java:117)
at org.apache.myfaces.trinidad.component.UIXCollection.invokeOnComponent(UIXCollection.java:1170)
at oracle.adf.view.rich.component.rich.data.RichTable.invokeOnComponent(RichTable.java:620)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.invokeOnComponent(ContextSwitchingComponent.java:222)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at oracle.adf.view.rich.component.fragment.UIXInclude.invokeOnComponent(UIXInclude.java:161)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnNamingContainerComponent(UIXComponentBase.java:1693)
at oracle.adf.view.rich.component.fragment.UIXRegion.invokeOnComponent(UIXRegion.java:625)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.invokeOnComponent(ContextSwitchingComponent.java:222)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at oracle.adf.view.rich.component.fragment.UIXInclude.invokeOnComponent(UIXInclude.java:161)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1627)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1750)
at org.apache.myfaces.trinidad.component.UIXDocument.invokeOnComponent(UIXDocument.java:106)
at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:1299)
at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:677)
at org.apache.myfaces.trinidad.change.RowKeySetAttributeChange._updateRowKeySetInPlace(RowKeySetAttributeChange.java:86)
at org.apache.myfaces.trinidad.change.RowKeySetAttributeChange.changeComponent(RowKeySetAttributeChange.java:53)
at org.apache.myfaces.trinidad.change.SessionChangeManager._applyComponentChanges(SessionChangeManager.java:399)
at org.apache.myfaces.trinidad.change.SessionChangeManager.applyComponentChangesForCurrentView(SessionChangeManager.java:73)
at org.apache.myfaces.trinidadinternal.application.ViewDeclarationLanguageFactoryImpl$ChangeApplyingVDLWrapper.buildView(ViewDeclarationLanguageFactoryImpl.java:343)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._renderResponse(LifecycleImpl.java:982)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:334)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:232)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:313)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:173)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:122)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)
at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:293)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:199)
at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:180)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)
at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)
at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)
at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)
at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)
at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)

After more investigations I have more details:
1. the error does not occur if the base table does not have rowSelection=”single”
2. the error does not occur if the base table has rowSelection=”single” but the popup is raised with showPopupBehavior
3. the error only occurs when the base table has rowSelection=”single” and we call the popup as inline popup (taskFlow with jsf page)

I could not reproduce the error on a newly created application in Jdevelope 11.1.2.1, it only happens to migrated applications.
We can not give up to rowSelection=”single” because of master-detail structures.